Aptitude and Reasoning Questions

Q:

In a class, there are 15 boys and 10 girls. Three students are selected at random. The probability that 1 girl and 2 boys are selected, is:

A) 21/46 B) 1/5
C) 3/25 D) 1/50
 
Answer & Explanation Answer: A) 21/46

Explanation:

Let S be the sample space and E be the event of selecting 1 girl and 2 boys.

 

Then, n(S) = Number ways of selecting 3 students out of 25

 

                = 25C3  = 2300.

 

         n(E)= 10C1*15C2 = 1050. 

 

P(E) = n(E)/n(s) = 1050/2300 = 21/46

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Filed Under: Probability

1 3618
Q:

Identify the diagram that best represents the relationship among classes given below

Delhi , Sri Lanka , Asia

A) 1 B) 2
C) 3 D) 4
 
Answer & Explanation Answer: B) 2

Explanation:
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Filed Under: Logical Venn Diagram
Exam Prep: Bank Exams

4 3617
Q:

The average age of a group of 10 students is 15 years. When 5 more students join the group, the average age increase by 1 year. The average age of the new student is?

Answer

Total age of 10 students = 150 years


Total age of 15 students = 240 years


Total age of 5 new students = 240 - 150 = 90 years


 Average age of 5 new students = 90/5 = 18 years.

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Subject: Problems on Ages

5 3615
Q:

Find the one which does not belong to that group ?

A) Neice B) Daughter
C) Daughter-in-law D) Mother
 
Answer & Explanation Answer: C) Daughter-in-law

Explanation:

All are blood relation except Daughter-in-law.

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Filed Under: Blood Relations
Exam Prep: AIEEE , Bank Exams , CAT , GATE
Job Role: Bank Clerk , Bank PO

6 3614
Q:

Read the data given below and answer the questions based on it.

 

In the CBSE Board exams last year, 53% passed in Biology, 61% percent passed in English, 60% in Social studies, 24% in Biology and English, 35% in English and social studies, 27% in Biology and social studies and 5% in none.

 

What is the ratio of percentage of students who passed in Biology and Social Studies but not English in relation to the percentage of students who passed in Social Studies and English but not Biology?

A) 5:7 B) 7:5
C) 4:5 D) 5:4
 
Answer & Explanation Answer: A) 5:7

Explanation:
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Filed Under: Percentage
Exam Prep: Bank Exams

2 3613
Q:

Calculate the value of x if 1 - x289 = 1517

 

A) 64 B) 44
C) 36 D) 54
 
Answer & Explanation Answer: A) 64

Explanation:
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Filed Under: Simplification
Exam Prep: Bank Exams

0 3613
Q:

The missing number in the series 9 81 ? 6561 59049

A) 729 B) 3561
C) 4213 D) None of the above
 
Answer & Explanation Answer: A) 729

Explanation:

The given series is 9 81 ? 6561 59049

It follows a pattern that

 

9

81 = 9 x 9

729 = 9 x 9 x 9

6561 = 9 x 9 x 9 x 9

59049 = 9 x 9 x 9 x 9 x 9

 

Hence, the missing number in the series is 729.

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Filed Under: Number Series
Exam Prep: AIEEE , Bank Exams , CAT
Job Role: Analyst , Bank Clerk , Bank PO

3 3613
Q:

If a mirror is placed on the line MN, then which is the right figure of the given image?

   4)  None

A) 1 B) 2
C) 3 D) 4
 
Answer & Explanation Answer: B) 2

Explanation:
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Filed Under: Image Analysis
Exam Prep: Bank Exams

0 3610